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Q. No.During muscular contraction, which of the following events occur?
(a)
'H' zone disappears
(b)
'A' band widens
(c)
'I' band reduces in width
(d)
Myosin hydrolyzes ATP, releasing the ADP and Pi
(e)
Z-lines attached to actins are pulled inwards
Choose the correct answer from the options given below:
1. (b), (c), (d) and (e) only
2. (b), (d), (e) and (a) only
3. (a), (c), (d) and (e) only
4. (a), (b), (c) and (d) only
Subtopic: Sliding Filament Theory |
82%
Level 1: 80%+
NEET - 2021
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Match List-I with List-II
| List-I | List-II | ||
| (a) | Scapula | (i) | Cartilaginous joints |
| (b) | Cranium | (ii) | Flat bone |
| (c) | Sternum | (iii) | Fibrous joints |
| (d) | Vertebral column | (iv) | Triangular flat bone |
Choose the correct answer from the options given below:
| (a) | (b) | (c) | (d) | |
| 1. | (iv) | (ii) | (iii) | (i) |
| 2. | (iv) | (iii) | (ii) | (i) |
| 3. | (i) | (iii) | (ii) | (iv) |
| 4. | (ii) | (iii) | (iv) | (i) |
Subtopic: Axial Skeleton: II | Appendicular Skeleton: Girdle | Fibrous & Catilaginous Joints |
81%
Level 1: 80%+
NEET - 2021
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Chronic auto immune disorder affecting neuro muscular junction leading to fatigue, weakening and paralysis of skeletal muscle is called as:
| 1. | Myasthenia gravis | 2. | Gout |
| 3. | Arthritis | 4. | Muscular dystrophy |
Subtopic: Disorders of Muscular and Skeletal System |
81%
Level 1: 80%+
NEET - 2021
Hints
Match the following columns and select the correct option:
| Column I | Column II | ||
| (a) | Gout | (i) | Decreased levels of estrogen |
| (b) | Osteoporosis | (ii) | Low Ca++ ions in the blood |
| (c) | Tetany | (iii) | Accumulation of uric acid crystals |
| (d) | Muscular dystrophy | (iv) | Autoimmune disorder |
| (v) | Genetic disorder |
| Options: | (a) | (b) | (c) | (d) |
| 1. | (ii) | (i) | (iii) | (iv) |
| 2. | (iii) | (i) | (ii) | (v) |
| 3. | (iv) | (v) | (i) | (ii) |
| 4. | (i) | (ii) | (iii) | (iv) |
Subtopic: Disorders of Muscular and Skeletal System |
90%
Level 1: 80%+
NEET - 2020
Hints
In a healthy human adult, what contributes maximum to the total body weight?
1. Muscle
2. Bone
3. Fat
4. Hair
1. Muscle
2. Bone
3. Fat
4. Hair
Subtopic: Introduction to Locomotion | Skeletal Muscle: Basic Anatomy |
87%
Level 1: 80%+
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The relaxation of muscle after contraction is related to:
1. Hydrolysis of ATP by the myosin head
2. binding of calcium ions to Troponin C
3. Pumping of calcium ions back to the sarcoplasmic cisternae
4. Release of acetylcholine at the neuro-muscular junction
1. Hydrolysis of ATP by the myosin head
2. binding of calcium ions to Troponin C
3. Pumping of calcium ions back to the sarcoplasmic cisternae
4. Release of acetylcholine at the neuro-muscular junction
Subtopic: Sliding Filament Theory | Muscle Contraction: Other Considerations |
75%
Level 2: 60%+
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The given diagram shows a representation of a synovial joint found between atlas and axis vertebrae. What is this type of synovial joint called?
| 1. | Hinge | 2. | Ball and socket |
| 3. | Pivot | 4. | Saddle |
Subtopic: Synovial Joint |
79%
Level 2: 60%+
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Which of the following bones is not a part of human cranium?
| 1. | Sphenoid | 2. | Maxilla |
| 3. | Ethmoid | 4. | Occipital |
Subtopic: Number of Bone in Axial Skeleton | Axial Skeleton |
84%
Level 1: 80%+
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Subtopic: Number of Bone in Appendicular Skeleton |
64%
Level 2: 60%+
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Identify the incorrect statement regarding the ultra-structure of a skeletal muscle:
| 1. | Z lines bisect the I band |
| 2. | G actin is a polymer of F actins |
| 3. | A subunit of troponin masks active binding sites for myosin on the actin filament. |
| 4. | Globular head of myosin has ATPase activity. |
Subtopic: Skeletal Muscle: Myofilaments |
77%
Level 2: 60%+
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